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Note 19 - Changes in Accumulated Other Comprehensive Income (Loss) by Component - Changes to Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2026 | Jun. 30, 2025
Balance | $ 281,446 |  | $ 264,215 |
Balance | 299,659 |  | 273,264 |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap [Member] |  |  |  |
Balance | 595 |  | 1,836 |
Other comprehensive gain (loss) before reclassifications | 1,102 |  | (1,491) |
Amounts reclassified from accumulated other comprehensive income: (1) | (403) |  | 749 | [1]
Balance | 1,294 |  | 1,094 |
Actuarial gains | (82) | [1] | (32) |
Tax expense | 21 |  | 8 |
Reclassification net of tax | (61) |  | (24) |
Realized gains on interest rate swaps reclassified to interest expense | (544) |  | (1,012) |
Tax expense | 141 |  | 263 |
Reclassification net of tax | (403) |  | (749) |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Steel Hedging Instrument [Member] |  |  |  |
Balance | 40 |  | (40) |
Other comprehensive gain (loss) before reclassifications | (37) |  | 96 |
Amounts reclassified from accumulated other comprehensive income: (1) | (3) |  | 0 |
Balance | 0 |  | 56 |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Balance | 2,546 |  | 3,676 |
Other comprehensive gain (loss) before reclassifications | 0 |  | 0 |
Amounts reclassified from accumulated other comprehensive income: (1) | (61) |  | (24) |
Balance | 2,485 |  | 3,652 |
AOCI Attributable to Parent [Member] |  |  |  |
Balance | 3,181 |  | 5,472 |
Other comprehensive gain (loss) before reclassifications | 1,065 |  | (1,395) |
Amounts reclassified from accumulated other comprehensive income: (1) | (467) |  | 725 |
Balance | $ 3,779 |  | $ 4,802 |
[1] | These components are included in the computation of benefit plan costs in Note 12.

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